25
Preventative Maintenance
This trailer was produced with the best available materials and quality craftsmanship. However, you as the owner,
have certain responsibilities for the correct care of the equipment. Attention to regular preventative maintenance
procedures will assist in preserving the performance of your equipment.
Axles, Hubs and Brakes
Maintenance for axles, hubs and brakes is extremely important for protecting the longevity of your trailer. It is
extremely important for your personal safety and the protection of others.
Never shortcut axle, hub and brake service and maintenance
Maintenance Schedule
Tire Air Pressure
Inflate to proper pressure indicated on
sidewall
Every Trip
Wheel Lugs, Bolts,
Nuts ans Wheel
Mount
Tighten to proper torque specifications
Every 3000 mi or 3 mos.*
Wheel
Check for damage and or out-of-round
Every 6000 mi or 6 mos.
Coupler Ball
Check for sufficient lube.
Check lock mechanism.
Check for unusual wear.
Every trip
Safety Chains at
Hitch Ball
Check for abrasion, distortion and general
integrity of links.
Every trip
Coupler
Check for proper fastening & hitch pin in
position and secure.
Every trip
Brakes
Check for proper adjustment & operation
Every trip
Breakaway Switch
Test switch operation and connections
Every trip
Breakaway Battery
Pull switch pin, check charge indicator light
Every trip
Load Distribution
Check load distribution & security
Every trip
Welds
Check all weld beads for cracks or separa-
tions
Every 6000 mi. or 6 mos.
Electrical: Lights &
Signals
Check to make sure all are working properly.
Replace burned out bulbs.
Every trip
*Check lug nuts for tightness before initial trip, at 10 miles, 25 miles and 50 miles. Recheck at least every 3
months or 3000 miles
Karcher Trailer 3500E HDS 4.7/35 Operator’s Manual 9.808-363.0 - B
